BIOS updates for Meltdown / Spectre
HP Workstations
https://support.hp.com/us-en/document/c05869091
HP Servers
https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-a00039267en_us
More here
OS Updates
MS operating systems
VMWare advisory
https://www.vmware.com/security/advisories/VMSA-2018-0002.html